Gift of Mutation

Enchant creature
Enchanted creature gets +2/+0 for each -1/-1
counter on it.
At the beginning of your upkeep, put a -1/-1
counter on enchanted creature. Then choose
flying, first strike, deathtouch, indestructible,
lifelink, or trample at random. Enchanted
creature gains the chosen ability until your next
turn.